The result shows the total intensity along the Linescan, sum of coherent and TDS intensity plotted vs specimen thickness and distance along the Linescan, and the same for only the coherent intensity and only the TDS-intensity. 7. Linescan with Bloch wave method To try the Bloch wave method, choose Bloch waves and press Bloch waves Par. Edit following parameters: The second parameter determines the maximum space frequency (k) used for the calculation of the atomic scattering amplitudes as a function of k. 20 per Angstrom usually is ok. Choose steps CRYST, LuT, Eig and Line and start the calculation (Doit). The resulting screen shot is

From the “Duration of calculation” listed in the “Messages” one can see that the Multislicecalculation is approximately 5 times faster than the Multislice method. The result, however, is the same. Therefore, the Bloch wave method is well suited for calculation of area-scans. 8. Area scan with Bloch wave method Choose the Area-step only and edit corresponding parameters: Result after a few minutes: